I get annoying twitching and stuttering on this track. Don't know what's going on...the fps counter (using Fraps) shows stable 75 or even 76 and only occasionally drops to 74 for a milisecond.

The stutter/twitch happens even with the counter showing solid 75 without any visible oscillations to the number.
There's also no sign of CPU being overloaded when stutters are occurring. What else can it be ?

EDIT:
Same on Long Beach. No problems at Laguna, Indy, Fontana - these all have solid 75, without any flickering of the fps number. The number flickers a lot (and sometimes very briefly changes to 74 or 76) at Long Beach and Vancouver, where i have issues. So now i know that if the number flickers or oscillates, even if just minor, it's very likely i'll have issues.

I have these annoying stuttering issues on various tracks, though, not just CART.
Will check if this fps number flickering is connected to stuttering on those tracks as well. Probably so.

Premium

Probably not much you can do but it seems like the last turn is horribly incorrect since the race broadcast for 1998 talks about how its the fastest corner on the track, going through it at something like 150mph, whereas in this version you can hardly get past 110-15 due to the shape of it.